题目内容
To our delight, this new smoke alarm system can effectively ____ very weak signals.
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We have sent your union ___ to look into the case and see who is responsible.
James is famous for skillfully using white and black colors; however, bright colors ____ his early paintings.
I made a(n)____ analysis between the two theories to show their similarities and differences.
The project is an important step toward a national health service, and the authorities are trying hard to ____ the exercise facilities.
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